oooohh, I done this before...accidentally while in Windows...took a bit of effort to recover. If you can get hold of a good BIOS from a older MB swap it and bring your system back up to A: with floppy in drive. Carefully with a chip extractor (nonmetallic as metallic can short the chip) extract the chip out and insert yours back in or if you can keep the new chip, leave it there. Now reflash with the proper BIOS update, not the custom. MSI has a SW that automatically updates their BIOS. It comes with the MB. If you do not want to do a hot swap and have a eeprom burner & the working chip at hand, you can do it that way. Some of the older VGA cards have similar chip and you can use those. Hopes this helps.